2014A&A...570A..24L


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST22:51:40

2014A&A...570A..24L - Astronomy and Astrophysics, volume 570A, 24-24 (2014/10-1)

CO in Hickson compact group galaxies with enhanced warm H2 emission: Evidence for galaxy evolution?

LISENFELD U., APPLETON P.N., CLUVER M.E., GUILLARD P., ALATALO K. and OGLE P.

Abstract (from CDS):

Galaxies in Hickson Compact Groups (HCGs) are believed to experience morphological transformations from blue, star-forming galaxies to red, early-type galaxies. Galaxies with a high ratio between the luminosities of the warm H2 to the 7.7µm PAH emission (so-called Molecular Hydrogen Emission Galaxies, MOHEGs) are predominantly in an intermediate phase, the green valley. Their enhanced H2 emission suggests that the molecular gas is affected in the transition. We study the properties of the molecular gas traced by CO in galaxies in HCGs with measured warm H2 emission in order to look for evidence of the perturbations affecting the warm H2 in the kinematics, morphology and mass of the molecular gas. We observed the CO(1-0) emission of 20 galaxies in HCGs and complemented our sample with 11 CO(1-0) spectra from the literature. Most of the galaxies have measured warm H2 emission, and 14 of them are classified as MOHEGs. We mapped some of these galaxies in order to search for extra-galactic CO emission. We analyzed the molecular gas mass derived from CO(1-0), MH2, and its kinematics, and then compared it to the mass of the warm molecular gas, the stellar mass and star formation rate (SFR). Our results are the following. (i) The mass ratio between the CO-derived and the warm H2 molecular gas is in the same range as found for field galaxies. (ii) Some of the galaxies, mostly MOHEGs, have very broad CO linewidths of up to 1000km/s in the central pointing. The line shapes are irregular and show various components. (iii) In the mapped objects we found asymmetric distributions of the cold molecular gas. (iv) The star formation efficiency (=SFR/MH2) of galaxies in HCGs is very similar to isolated galaxies. No significant difference between MOHEGs and non-MOHEGs or between early-type and spiral galaxies has been found. In a few objects the SFE is significantly lower, indicating the presence of molecular gas that is not actively forming stars. (v) The molecular gas masses, MH2, and ratios MH2/LK are lower in MOHEGs (predominantly early-types) than in non-MOHEGs (predominantly spirals). This trend remains when comparing MOHEGs and non-MOHEGs of the same morphological type. We found differences in the molecular gas properties of MOHEGs that support the view that they have suffered (or are presently suffering) perturbations of the molecular gas, as well as a decrease in the molecular gas content and associated SFR. Higher resolution observations of the molecular gas are needed to shed light on the nature of these perturbations and their cause.

Abstract Copyright:

Journal keyword(s): galaxies: evolution - galaxies: groups: general - galaxies: ISM - galaxies: interactions - infrared: galaxies - medium intergalactic

VizieR on-line data: <Available at CDS (J/A+A/570/A24): table2.dat list.dat fits/*>

Simbad objects: 56

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Number of rows : 56

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 HCG 100 CGG 00 01 19.783 +13 07 21.81           ~ 55 0
2 NGC 7803 GiG 00 01 19.9677421510 +13 06 40.458382269   13.8   12.62   ~ 78 0
3 HCG 6 CGG 00 39 10 -08 23.7           ~ 27 0
4 2MASX J00391023-0823499 G 00 39 10.2070754455 -08 23 49.553988516   16.16   14.18   ~ 17 0
5 2MASX J00391111-0823599 G 00 39 11.0760888920 -08 23 59.620936889   15.97   14.09   ~ 13 0
6 UGC 1618 GiG 02 07 37.5121456393 +02 10 50.625431136   15.3   13.69   ~ 41 0
7 HCG 15 CGG 02 07 39.0 +02 08 18           ~ 67 0
8 UGC 1624 GiG 02 07 53.061 +02 10 03.49   15.2   13.08   ~ 42 0
9 HCG 25 CGG 03 20 43.7 -01 03 07     13.6     ~ 57 0
10 2MASX J03204534-0103137 G 03 20 45.3268078835 -01 03 14.231588115   16.66   14.96   ~ 26 0
11 UGC 2691 GiG 03 20 45.411 -01 02 40.97   14.9   12.33   ~ 44 0
12 HCG 31 CGG 05 01 37 -04 15.4           ~ 123 0
13 2MASX J05013782-0415294 G 05 01 37.832 -04 15 28.48   13.44   12.76   ~ 68 1
14 NGC 1741 IG 05 01 38.3 -04 15 25   13.7   13.02 13.6 ~ 250 0
15 2MASXI J0501387-041533 G 05 01 38.301 -04 15 33.91   15.62   14.43   ~ 23 0
16 MCG-01-25-009 GiG 09 38 53.610 -04 51 36.58   15.82   13.66   ~ 49 0
17 APG 321 IG 09 38 54 -04 51.1   15       ~ 79 0
18 MCG-01-25-012 GiG 09 38 54.961 -04 51 57.31   15.19   13.24   ~ 41 0
19 MCG-01-25-010 GiG 09 38 55.763 -04 50 13.45   15.20   13.54   ~ 45 0
20 NGC 3187 GiP 10 17 47.8695015096 +21 52 24.005791156 13.71 13.91 13.44 14.06   ~ 144 1
21 HCG 44 CGG 10 18 00 +21 48.7           ~ 76 0
22 NGC 3189 GiP 10 18 05.643 +21 49 54.98 12.60 12.12 11.15 11.14   ~ 356 2
23 UGC 5644 LIN 10 25 46.2573925001 +13 43 00.630941084   15.29   13.56   ~ 51 0
24 MCG+02-27-014 AGN 10 25 47.755 +13 44 56.82   17.16   15.99   ~ 27 0
25 HCG 47 CGG 10 25 47.904 +13 44 12.36           ~ 39 0
26 LEDA 35573 G 11 32 05.32 +70 48 37.9   17.43   15.31   ~ 18 0
27 UGC 6514 IG 11 32 07 +70 48.7   15.2       ~ 45 0
28 HCG 56 CGG 11 32 32 +52 56.9           ~ 40 1
29 2MASX J11323278+5256220 G 11 32 32.774 +52 56 21.44   16.54   15.19   ~ 32 0
30 VV 150b G 11 32 36.732 +52 56 51.63   15.87   14.27   ~ 33 0
31 Mrk 176 Sy2 11 32 40.2437529352 +52 57 01.304442422   15.50 14.61 13.52   ~ 226 2
32 HCG 57 CGG 11 37 50.5 +21 59 06     15.4     ~ 81 1
33 NGC 3753 AGN 11 37 53.783 +21 58 51.82   14.6   13.19   ~ 62 1
34 NGC 3754 LIN 11 37 54.9240360373 +21 59 07.910104865   15.2   14.30   ~ 43 1
35 MCG-01-35-013 GiG 13 48 59.454 -07 11 41.75   15.26   13.57   ~ 46 0
36 HCG 67 CGG 13 49 03.5 -07 12 20           ~ 51 0
37 NGC 5350 GiP 13 53 21.584 +40 21 50.24   12.4   10.99   ~ 195 0
38 NGC 5353 GiP 13 53 26.7 +40 16 59   11.8   10.57   ~ 247 1
39 NGC 5354 LIN 13 53 26.730 +40 18 09.91   12.3   10.64   ~ 148 0
40 HCG 68 CGG 13 53 40.9 +40 19 07     12.4     ~ 107 0
41 MCG+04-38-006 GiG 15 59 11.156 +20 45 17.02   13.4   13.46   ~ 66 1
42 HCG 79 CGG 15 59 11.605 +20 45 24.66           ~ 103 0
43 NGC 6027 GiG 15 59 12.542 +20 45 48.07   13.4   13.07   ~ 95 2
44 NGC 6161 G 16 28 20.562 +32 48 34.80   15.74   14.53   ~ 35 0
45 HCG 82 CGG 16 28 22.1 +32 49 25     18.72     ~ 36 0
46 NGC 6163 EmG 16 28 27.920 +32 50 46.67   15.4   13.66   ~ 39 0
47 HCG 91 CGG 22 09 00.8 -27 47 36           ~ 51 0
48 NGC 7214 Sy1 22 09 07.6626319170 -27 48 34.155863437   12.48 14.10 11.40   ~ 120 0
49 ESO 467-13 GiG 22 09 13.9921604181 -27 46 55.654703940   14.76   13.99   ~ 48 0
50 NAME Stephan's Quintet CGG 22 35 57.5 +33 57 36           ~ 375 1
51 MCG+01-59-046 G 23 19 27.848 +09 29 40.46   16.38 15.38 14.66   ~ 41 0
52 NGC 7609 IG 23 19 30.0444164101 +09 30 29.851567029   15.23 14.29 13.43   ~ 62 0
53 HCG 95 CGG 23 19 32 +09 29.5           ~ 50 0
54 NGC 7674 Sy2 23 27 56.6974755223 +08 46 44.238278540 13.84 13.92 13.23 12.64   ~ 635 4
55 MCG+01-59-081 G 23 27 58.7548658924 +08 46 57.877607821   16.10   14.38   ~ 52 0
56 HCG 96 CGG 23 28 00.462 +08 46 36.41           ~ 45 0

    Equat.    Gal    SGal    Ecl

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2020.07.03-22:51:40

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